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(No Model.) 2 SheetsSheet 1.

J. R. THAME. GONTRAGTIBLB GYLINDER FOR MAKING CYLINDERS PROM PAPER PULP. No. 434,740. Patented Aug. 19, 1890.

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(No Model.) 2 Sheets-Sheet 2.

J. R. THAMB. GONTRAGTIBLE CYLINDER FOR MAKING CYLINDERS PROM PAPER PULP.

No. 434,740. Patented Aug. 19, 1890.

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UNITED STATES PATENT OFFICE.

J AMES RAPER THAME, OF LONDON, ASSIGNOR OF ONE-HALF TO HERBERT SANGUINETTI, OF MIDDLESEX COUNTY, ENGLAND.

CONTRACTIBLE CYLINDER FOR MAKING CYLINDERS FROM PAPER-PULP.

SPECIFICATION forming part of Letters Patent No. 434,740, dated August 19, 1890.

Application filed May 27, 1889. Serial No. 312,295. (No model.) Patented in England January 9, 1888, N0. 846; in France February 8,1888, No. 188,616; in Belgium February 8,1888, N 22,538, and in Spain July 13,1888, No. 8,043. 7

To all whom it may concern:

Be it known that 1, JAMES RAPER THAME, mechanical engineer, a subject of the Queen of Great Britain, residing at 147 Bridge Road,

5 Battersea, in the count-y of Surrey, England,

have invented certain new anduseful Improvements in Contractible Cylinders for Making Cylinders from Paper Pulp, (for I which I have obtained Letters Patent in Great Britain January 9, 1888, No. 346; in

France February 8, 1888, No. 188,616; in Belgium February 8, 1888, No. 80,579; in Austria- Hungary June 4, 1888, No. 10,682 and No. 22,538, and in Spain July 13, 1888, No. 8,043,) I of which the following is a specification.

This invention refers to improvements in machinery for manufacturing barrels and cylinders from pulp, and particularly to the construction of contractible formers or cylin- 2o ders. The barrels, sometimes known, according to size and shape, by such allied terms as tubs, drums, kegs, or cylinders, are made of substantially cylindrical form, the body in one piece and end pieces in sepa- The barrel is formed by inwrapping a continuous sheet of wet pulp onto a rotating contractible cylinder. Preferably for economical work such contractible cylinder is one of a number on the machine. The contractible cylinder laps up the Wet pulp around its circumference, layer on layer, until the required thickness is attained, the flow of pulp being maintained by a feeding-apron constructed, supported, and operating sub- 3 5 stantially as is common in mill-board machines used in making mill-boardthat is to say, the feed-apron or felt c is an endless felt sheet running on rollers driven in ordinary or substantially ordinary manner. The con- 0 tractible cylinder to which this flowing pulp is first supplied having completed its inwrapping of pulp, the continuity of the stream of pulp is broken by lifting the roll by the lifting mechanism, to be more fully described. 5 The fully-loaded cylinder is then turned from contact with the apron and another empty contractible cylinder brought into its place to receive its complement of pulp. When one cylinder is full another cylinder is brought into position to be filled by contact, while 0. 80,679 in Austria-Hungary June 4, 1888, No. 10,682 and No,

the first cylinder filled is being relieved of the pulp cylinders or barrels to be taken away for drying and finishing. The wet pulp as it is being inwrapped on the contractible cylinder becomes pressed between the cylinder and the surface of the apron (where it is supported by the supportingroller underneath it, as will be more fully described hereinafter) into a homogeneous pulp, cylindrical, open-ended barrel. The pulp-tubes may be carried from the contractible cylinders on a temporary carrier to the drying and finishing room, wherein currents of air or steam-drying abstracts moisture. The contractible-cylinder is partially collap- 6 5 sible, a gap having grooves or recesses formed in the abutting surfaces, in which recesses fit corresponding projections formed on a fillingpiece, and this piece therein slides; or the gap may have the projecting edges to slide in a recessed filling-piece. Collapsing of the cylinder in the absence of the filling-piece is effec'ted by a double-action screw-piece connected across the interior of the cylinder, as will now be described.

Figure 1 is a longitudinal sectional View of a set of contractible cylinders, herein shown as an example of convenient arrangement of four such contractible cylinders set around one main axis and rotatable thereon as a center and capable of coming in turn in contact with the supply-apron. Fig. 2 is a crosssection of the set of contractible cylinders, and showing a convenient manner of mounting. Fig. 3 is a cross-section, and Fig. 4 a side view, of a contractible cylinder separately, and Fig. 5 is a contracting-bar therefor.

c is an endless apron stretched over rolls, which apron c carries the pulp fed to it in ordinary manner to the contractible cylinders on which it is inwrapped.

d d are supporting-rolls situated under the apron c, where they are pressed upon by the contractible cylinders e and f. The sheet of pulp is carried to the contractible cylinder 5 next the apron c, and in the rotation of that contractible cylinder in the direction of the arrow the pulp is inwrapped thereon to the number of layers required, the cylinder be ing pressed upon by the apron, and the sup 100 matically by an ordinary timing-cam or-by porting-roll squeezes out water, amalgamates and solidifies the pulp. The one cylinder being covered, it is lifted and turned out of contact, the next cylinder of the other set being then brought down on apron c and filled, and so on. The cylinders 1, 2, 3, 4, 5, 6, 7, and 8 are each in pairs carried at opposite ends of a shaft h, which is centrally supported in a hollow bearing it, supported in a disk k borne by the main axis 71.", which revolves in end block-bearings h in the side frames 2' 2', so as to admit of vertical movement to those bearing-blocks. These side guide-frames i also serve in like manner to guide similar bearing-blocks 70 k for the axes k k of the under rolls d d as they are pressed up against the cylinders f e by the weighted levers Z l, hinged to the blocks 70 k at l, centered to the frames 2' at Z and weighted at Z Z are set-screws carried by a stop-bar under each lever Z to control the distance of its drop. The lifting of the Weighted ends of the levers Z lowers the bearings 70' k and the rolls d d from the under side of the apron c, and adjustment of the position of the weights on the levers Z regulates the pressure of those rolls on that apron.

The number of rolls or cylinders in the sets 6 or f may be varied, and they are rotated by frictional contact with the apron c, and as soon as each cylinder is filled the continuity of the sheet of pulp is broken and the cylinder changed by a quarter-turn movement being given to the axis h by a belt operatinga clutch being put into operation either autohand.

The rolls or cylinders of the sets a f are composed of a plain imperforated cylindrical body g of non-oxidizable metal or material.

7225 is a wheel on each arm or axis h, fitting within and supporting acylinder, as Z. Each cylinder has end plates g 9 fitting the shell g, and by central openings also fitting blocks on the axis h, on which they are mounted. To remove a cylinder g, the nut g is unscrewed from the axis 71. and the cylinder 9 can be drawn off. 1

In the cylinder shown by Figs. 3and 4 provision for expansion to full diameter of the cylindrical shape of the interior of the pulptube to be made is attained by sliding the removable part g into the gap 9 left in the cylinder g, the holding of these parts being facilitated by projections on the one entering grooves in the other, and when it is desired to contract the cylinder the part 9 is removed, and by screw union-pieces g operating by engaging the reverse threads of screws 9 connected to the opposite lugs g g, the sides may be withdrawn and the pulp-tube released.

The paper tube is built up from the wet pulp on this cylinder g, which cylinder is collapsible.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is A contractible hollow cylinder adapted for forming thereon articles composed of continuous layers of paper-pulp constructed of imperforated metal and having a portion of its periphery fitting together in grooved meeting edges and removable endwise from the cylinder and combined with an expanding and contracting bar 9 and screw union-pieces serving to draw in the sides of the cylinder, all as set forth.

In testimony whereof I, the said JAMES RAPER THAME, have hereunto set my hand.

JAMES RAPER TI-IAME. Witnesses:

HENRY THAME, AMBROSE FISH. 

